The firm is also appointing David Richardson as managing director and head of institutional sales and client service for North America.

The moves follow the launch in March of Impax’s US subsidiary and appointment of Ken Locklin as managing director. The firm, meanwhile, set up an office in Hong Kong last year.

Richardson has over 25 years of institutional investment experience and joins from Global Energy Investors where he was a managing partner.  Between 1987 and 2009, he was at Dwight Asset Management as a managing director and head of business development.

Impax, founded in 1998, oversees $2.9 billion for institutional and high net worth investors globally.

The firm’s public equity funds seek out mis-priced companies that are set to benefit from the long-term trends of changing demographics, rising consumption, limited natural resources and urbanisation.